Improvement in saw-mhils



@stent @hijita THOMAS E. CHANDLER, 0F INDIANAPOLIS,v INDIANA.v

'Letters Patent No. 97,357, lated November 30, 1869.

IMPROVEMENT IN SAW-MILLS.

The Schedule referred to in these Lettere Patent and making part of thesame.

To all whom 'it mcy concern.:

scription thereof', reference vbeing had to the accompanying drawing,and to the letters ot' reference marked thereon, making part oi' thisspecification.

My invention relates to mode of moving and ad justing the log to thesaw'iu saw-mills, andr consists in arranging the devices, by which theknees are actuated to move the log, in such manner that the log may bemo'ed up to the saw in a parallel line with it, as innsawing boards, orthat either end of the log may be set forward, as in sawing fence-postsor `other tapering timbers; the levers by which' the device is actuatedbeing situated at the head end of the carriage, so Vas to be under thecontrol of one attendant, who is not required to change his position toset the log.

' Figure l isa vertical longitudinal section of the I head-block, takenjust inside of one of the side plates of the bed or frame.

Figure 2 is a side elevation of the head-block, the middle portion beingcut out, in order lto shorten the ligure.

Figure 3 is aside view of the log-carriage, showing end views of thehead-blocks and the arrangement of my device for moving and adjustingthe log.

Similar letters of reference indicate corresponding lparts in'theseveral gures.

The Afollowing description will enable skilled artisans to make and usemy invention.

K is the log-carriage, on which the head-blocks are placed. v i

The head-blocks are composed of the bed or frame A and the knees B, thelatter being grooved in ythe sides, to receive and slide on the tonguesor flanges,

formed in the topplate of' the bed A, as shown in.

grLhe log X rests on the beds A, and is moved up and held to the saw bymeans ofthe knees B.

The knees are'furnished with a cog-bar, C, lig. l, on the under side,which engages with a pinion, I), on a short shaft, J, having` itsbearings in the two sides ofthefbed or frame A.

One end of shaft J projects through the side of the frame, far enough toreceive the ratchet-wheel G, which is fixed on the projecting end of theshaft, as shown in fig.. 2.

The knees B are actuated to move the log up to the saw by means of pawlsH H', hung in short levers O, fixed on the hollow rod I', and on thelong rod I, that engage with the ratchet-wheel G, motion being impartedto the pawls by means of thelevers l? and S, which are fixed, by theirlower ends, to the hollow rod I and rod I, respectively, by which theattendant gives a reciprocating rotary motion to these rod The long rodvI extends through both head-blocks, as shown in iig. 3, one end ofwhich rests in the upright L, near the lixed head-block, the other endpassing through the movable head-block, so that the latter may be movedback and forth, as may be required, for logs ofvarious lengths.

The rod I is grooved or key-seated, so that the lever O, iu which thepawls are'hung, may be moved to correspond with Vthe headblock.

The short levers are slotted, near the ends, in which the pawlsH H' arehung, so that the latter may be moved to or from the rods, in order toadjust the reach of the pawls to actnate the ratchets Gr alike.

A ratchet-bar, E, is attached to the inside of'ione of the side platesof the bed A, the notches in which are the same distance from-thesaw-end of botlrfheadblocks, and a hooked lever, F, is hung in the kneeB,

so as to engage vwith the notches in the ratchet-bar E,vfor the purposeof setting theknees at the same startingpoint, without requiringadjustment by the figured scale, usually made on the upper surface ofthe bed A.

It will be readily understood, that by moving both of the levers, P andS, simultaneously, both ends of the log will be moved up to the saw, ina parallel line with it, as in sawing-boards; and that by operatingeither of the levers I. S separately, either end of the log may be movedforward, as may berequired, as in sawing fence-posts or other taperingtimber.

I am aware of the patent granted to Charles `Roberts, January 21,A1868,for improvement in saw-mills, and make-no clairntto the devices thereinset forth.

Having thus fully described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

The arrangement, herein described, of levers P S, shaft I, `and hollowshaft I', in connection with levers O, pawls H H', ratchet G, and pinionD, for actuating the knees B, as set forth.

THOMASWE. CHANDLER.

Witnesses:

` O. F. MAYHEW, A. P. STANTON.

